INS and diabetes mellitus: A small number of studies to date have examined the associations between the ABSI and/or BRI and insulin sensitivity (SI) using fasting insulin.14–17 In adults without diabetes, the ABSI is weakly correlated with SI, whereas the BRI shows a stronger correlation with SI, comparable to traditional anthropometric indices.14,15 In obese and young persons, it is the BRI, not the ABSI that is reportedly correlated with SI.16,17 These epidemiological studies had small sample sizes and limitations in terms of age and glucose tolerance.